Accuracy of Doppler-Estimated Pulmonary Vascular Resistance in Patients Before Liver Transplantation

Farzaneh‐Far, Ramin; McKeown, B.; Dang, Dan; Roberts, John P.; Schiller, Nelson B.; Foster, Elyse

doi:10.1016/j.amjcard.2007.07.086

Cited by 60 publications

(49 citation statements)

References 17 publications

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“…PH as a group was less severe than our patient population with a mean PVR of 2 Wood units and a range from 0.7 to 6 Wood units. Farzaneh-Far et al 12 also used TRV/VTI RVOT to estimate PVR in a series of patients with suspected porto-pulmonary hypertension and found significant correlation with invasively determined PVR. Similar to the previous study, PH as a whole was less severe than in our population with a mean PVR of 1.1 ± 1.4 Wood units.…”

Section: Discussionmentioning

confidence: 99%

Noninvasive Estimation of Pulmonary Vascular Resistance in Pulmonary Hypertension

et al. 2009

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Section: Discussionmentioning

confidence: 99%

Noninvasive Estimation of Pulmonary Vascular Resistance in Pulmonary Hypertension

et al. 2009

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“…A RVP pode ser estimada pela simples relação do pico da IT (em metros por segundo) pela integral da velocidade pelo tempo do fluxo na VSVD (em centímetros). [87][88][89] Esta relação não é confiável em RVP muito elevadas, com valores > 8 Wood, conforme calculada por métodos hemodinâmicos invasivos.90 Um dos métodos para determinar a RVP está ilustrado na Figura 14.…”

Section: Resistência Vascular Pulmonarunclassified

Guidelines for the Echocardiographic Assessment of the Right Heart in Adults: A Report from the American Society of Echocardiography

Rudski¹,

Lai²,

Afilalo³

et al. 2014

Arquivos Brasileiros De Cardiologia - Imagem Cardiovascular

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Divulgação do autor: Os autores desse artigo não relataram nenhum conflito de interesse atual ou potencial em relação a essa atividade. Os autores e revisores RVT, FASE; Farooq A. Chaudhry, MD, FASE; Robert T. Eberhardt, MD; Benjamin W. Eidem, MD, FASE; Gregory J.Ensing, MD, FASE; Tal Geva, MD, FASE; Kathryn E. Glas, MD, FASE; Sandra Hagen-Ansert, RDCS, RDMS,MS, FASE; Rebecca T. Hahn, MD, FASE; Jeannie Heirs, RDCS; Shunichi Homma, MD; Sanjiv Kaul, MD,FASE; Smadar Kort, MD, FASE; Peg Knoll, RDCS, FASE; Wyman Lai, MD, MPH, FASE; Roberto M. Lang,MD, FASE; Steven Lavine, MD; Steven J. Lester, MD, FASE; Renee Margossian, MD; Victor Mor-Avi,PhD, FASE; Sherif Nagueh, MD, FASE; Alan S. Pearlman, MD, FASE; Patricia A. Pellikka, MD, FASE; MiguelQuinones, MD, FASE; Brad Roberts, RCS, RDCS; Beverly Smulevitz, BS, RDCS, RVS; Kirk T. Spencer,MD, FASE; J. Geoffrey Stevenson, MD, FASE; Wadea Tarhuni, MD, FASE; James D. Thomas, MD; Neil J.Weissman, MD, FASE; Timothy Woods, MD; and William A. Zoghbi, MD, FASE. Os

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“…An early model based on the ratio of TTFV to RVOT velocity time integral (RVOT-VTI) has been validated to predict PVR in patients with cirrhosis and adverse outcomes among coronary disease patients. 8,15,16 This model, however, was derived in patients with normal or mildly elevated PVR, and has poor agreement at higher levels of PVR. 17,18 Equations using transtricuspid pressure gradient (4 x TTFV 2 ) in place of TTFV have been derived for patients with markedly elevated PVR.…”

Section: Introductionmentioning

confidence: 99%

A Simple Echocardiographic Method to Estimate Pulmonary Vascular Resistance

Opotowsky¹,

Clair²,

Afilalo³

et al. 2013

The American Journal of Cardiology

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Pulmonary hypertension is comprised of heterogeneous diagnoses with distinct hemodynamic pathophysiology. Identifying elevated pulmonary vascular resistance (PVR) is critical for appropriate treatment. We reviewed data for patients seen at referral PH clinics who underwent echocardiography and right heart catheterization within 1 year. We derived equations to estimate PVR based on the ratio of estimated pulmonary artery (PA) systolic pressure (PASPDoppler) to RVOT VTI. We validated these equations in a separate sample and compared them to a published model based on the ratio of transtricuspid flow velocity to RVOT VTI (Model 1, Abbas et al 2003). The derived models were: italicPVR=1.2×PASPRVOT VTI italicPVR=PASPRVOT VTI+30.2emitalicif notch present The cohort included 217 patients with mean PA pressure=45.3±11.9mmHg, PVR=7.3±5.0WU and PA wedge pressure=14.8±8.1mmHg; just over 1/3rd had PA wedge pressure >15mmHg (35.5%) and 82.0% had PVR>3WU. Model 1 systematically underestimated PVR, especially with high PVR. The derived models demonstrated no systematic bias. Model 3 correlated best with PVR (r=0.80 vs. 0.73 and 0.77 for Models 1 and 2 respectively). Model 3 had superior discriminatory power for PVR>3WU (AUC=0.946) and PVR>5WU (AUC=0.924), though all models discriminated well. Model 3 estimated PVR>3 was 98.3% sensitive and 61.1% specific for PVR>3WU (PPV=93%; NPV=88%). In conclusion, we present an equation to estimate PVR, using the ratio of PASPDoppler to RVOT VTI and a constant designating presence of RVOT VTI mid-systolic notching, which provides superior agreement with PVR across a wide range of values.

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Accuracy of Doppler-Estimated Pulmonary Vascular Resistance in Patients Before Liver Transplantation

Cited by 60 publications

References 17 publications

Noninvasive Estimation of Pulmonary Vascular Resistance in Pulmonary Hypertension

Noninvasive Estimation of Pulmonary Vascular Resistance in Pulmonary Hypertension

Guidelines for the Echocardiographic Assessment of the Right Heart in Adults: A Report from the American Society of Echocardiography

A Simple Echocardiographic Method to Estimate Pulmonary Vascular Resistance

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